110db Wireless Remote Control Vibration Alarm for Bicycle Anti-theft Protection System

How to use: 

1. Default code "ABCA" 

2. Code Change. When unit not work

3. Press 'A' for 3 seconds and you will hear a short 'Di' sound, input old code, you will hear a 'DiDiDi' sound if correct. Then you should input your 4 digital now code not later than 5 seconds, you will hear a 'DiDiDi' sound if success. If you input the wrong old code or failded to change the code, you will hear long 'Di' sound. Then you should repeat the press

4. If you take out the battery exclude 30s. it will go back default code automatic

5. Default sensitivity: middle 

6. Sensitivity adjust. When the unit not work, press "C" and hold on until you hear( you should loose your hands after you hear each sound)

7. Di=High sensitivity; DiDi=middle sensitivity ; DiDiDi=low sensitivity

8. work after 5 seconds delay

9. Relieve alarm. Input your 4 digital code then you will hear a "DiDiDi" sound if correct. If input wrong code, you will hear a long "Di" sound

10. The key pad will be locked for 3 minutes if you input the wrong code 4 times in succession, and will resume 3 minutes later

11. When triggered alarm had already sounded for 5 times, If triggered again within 5 seconds , it will sound continuously for 15 seconds. I'm sure so powerful function must can protect your bicycle effectively.